Hello, The pci-mvebu driver already contains some logic to emulate a root port PCI bridge. It turns out that we have a similar need for the pci-aardvark driver. Instead of duplicating the same logic in two drivers, this patch series starts by adding a small common infrastructure that helps emulate a root port PCI bridge, converts pci-mvebu to use it, and finally extends pci-aardvark to use it as well. Thanks to this, Marvell Armada 3720 based systems, which use the Aarkvark PCI controller, will have better PCI support, by having a root port PCI bridge exposed. The emulated PCI bridge common logic is a proposal, I very much welcome comments and suggestions. Also, if you feel that adding a common logic for only two drivers is too early, I'm fine with duplicating a bit of code betwen pci-mvebu and pci-aardvark. Best regards, Thomas Thomas Petazzoni (2): PCI: Introduce PCI software bridge common logic PCI: mvebu: Convert to PCI software bridge Zachary Zhang (1): PCI: aardvark: Implement emulated root PCI bridge drivers/pci/Kconfig | 3 + drivers/pci/Makefile | 1 + drivers/pci/controller/Kconfig | 2 + drivers/pci/controller/pci-aardvark.c | 119 ++++++++++- drivers/pci/controller/pci-mvebu.c | 370 ++++++++++------------------------ drivers/pci/pci-sw-bridge.c | 149 ++++++++++++++ include/linux/pci-sw-bridge.h | 125 ++++++++++++ 7 files changed, 497 insertions(+), 272 deletions(-) create mode 100644 drivers/pci/pci-sw-bridge.c create mode 100644 include/linux/pci-sw-bridge.h -- 2.14.4
